Drive-chain.



No. 663,353. Patented Dec. 4, I900. E. F. MORSE.

DRIVE CHAIN.

(Application filed Feb. 28, .1898.)

(No Model.)

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Witnesses:

Invemor EverettEMorse 6. V lay Aziorne z s Urtrrs' STATES ATENT FFEQE.

EVERETT F. MORSE, OF TRUMANSBURG, NEW YORK, ASSIGNOR TO THE MORSE CHAIN COMPANY, OF SAME PLACE.

DRIVE-CHAIN.

SPECIFICATION forming part of Letters Patent N 0. 663,353, dated December 4, 1900.

Application filed February 26, 1898. Serial No. 671,766. (No model.)

T0 at whmn it may concern.-

Be it known that I, EVERETT F. MORSE, a citizen of the United States, and a resident of lrumansburg, in the county of Tompkins and State of New York, have invented certain new and useful Improvements in Drive-Chains, of which the following is a specification.

This invention relates to sprocket-chains for general driving purposes, but especially to that class of these chains wherein a roller is interposed to make engagement with the sprocket.

It further relates to those chains having a two-part bearing pin or pintle in which said parts are made of hardened tool-steel and roll one upon the other, reducing thereby friction and wear and the consequent lengthening of the chain and the destruction of the sprockets. This latter class of chains is exemplified in Patent No. 583,150, granted May 25, 1897.

One of the greatest objections to sprocketchains is the lengthening or stretching thereof by use, since it increases the pitch of the chain beyond that of the sprocket-wheels and causes the links to gouge out the sprocketteeth. It also necessitates frequent adjustment of the sprocket-wheels to take up slack in the chain or the extraction of links from the chain for the same reason.

The object of this invention is to produce adrive-chain in which both these defects are overcome and which for that reason shall have a minimum amount of friction in its joints and upon the sprockets and which shall be durable and to the greatest possible degree devoid of a tendency to lengthen or stretch by use.

To this end the invention consists in the construction, combination, and arrangement of the parts of a drive-chain, as hereinafter fully described, and set forth in the claims.

In the accompanying drawings, which form a part of this specification, Figure 1 represents in edge view or side elevation a drivechain embodying the invention. Fig. 2 is a partially-sectionized plan view of the subject of Fig. 1. Fig. 3 is a longitudinal section of a portion of the chain seen in the first two figures; and Figs. etand 5 show the outer and inner side links, respectively.

The parts of the chain may be designated as follows, viz: A refers to the outside links; B, to the inside links; 0, to that part of the pintle which may be termed the seat-pin; D, to that part of the pintle which may be termed the rocking pin, and E to the roller or sleeve surrounding the parts of the pintle.

The seat-pins C, as shown in Figs. 1 and 2, are provided with shoulders a and with a nick just beyond them, into which metal from the outside links A may be forced, as indicated at 00, so as to secure the parts together. This method of construction is fully disclosed in my Patent No. 583,151, granted May 25, 1897.

The inside links B have circular openings at their ends, through which the seat-pins pass and in which the ends of the rocking pins rest in their coaction with the seat-pins. In this form of chain the rocking pins are preferably held to the position shown in Figs. 1 and 3 and may be readily so held by projections, as a, on the links B taking into a groove, as y, formed in the back of the pin D. In this manner the flat bearing-surface of the rocking pin is always maintained at right angles to the line of strain upon the sprocket-teeththat is, at right angles to the length of the inside links. Therefore there can be no tendency of the rocking pin to slip in its coaction with the rounded bearing surface or ridge 1; upon the medial line of the seat-pin O.

Other means may be employed for holding the pin D in the central position just described; but the one illustrated is that at present preferred, since in it the lugs ,2 may be readily produced at the stamping out of the link B, and the groove y may be readily produced at the rolling or drawing of the rods from which the pins D are cut.

The sleeves or rollers E surround the parts 0 and D of the pintles and extend between the links B, as shown, for making engagement with the sprocket-teeth, said teeth entering in the spaces G, Fig. 2. In this way the wear between the sleeve and the two-part pintle comes upon the larger and absolutely rigid the links B, whereby uninterrupted sides are provided for the sprocket-teeth apertures G. In this application, as in one filed by me concurrently herewith, Serial No. 671,765, the

sleeve or roller is shown in combination with the two-part pintle; but such combination is not claimed in this application.

The invention claimed is- 1. The combination with the outside links,

of the seat-pins connecting 'them, the inside links through which said seat-pins pass, and the rocking pins coacting with the seat-pins and positively fixed at their ends in a medial position in the ends of the side links.

2. The combination with that portion of the chain which rests between adjacent sprocketteeth and consists of the outside links held together by the seat-pins and the sleeves surrounding said pins, of the inside links through the ends of which the seat-pins pass, and the rocking pins passing through the sleeves and positively confined in a medial position in the ends of the inside links.

3. The combination with the outside links, of a seat-pin fixed in either end thereof and provided with a rounded bearing surface or ridge 1;, the inside links through the ends of which the seat-pins pass, and a rocking pin positively fixed at its ends in the ends of the side links and having a bearing-surface coacting with or rocking upon the ridge of the seatpin, as and for the purpose set forth.

4. The combination with the outside links, of the seat-pins joining them each of which is provided with a rounded medial ridge, the inside links through which the seat-pins pass, and the rocking pins each positively confined at its ends in the inside links and provided with a plain surface located at right angles to the length of the inside links and coacting with said ridge, for the purpose set forth.

5. The combination with the outside links and seat-pins joining them, of the inside links through holes in the ends of which the seatpius freely pass, said holes having lugs projecting therein, and the rocking pins located at their ends in said holes and held in place by means of said lugs, for the purpose set forth.

6. In a chain having a two-part pintle, substan tially as described, the combination with a seat-pin and inside links, of a rocking pin having a groove along itsback, and means entering said groove to hold the rocking pin in a fixed relation relative to the inside links, as and for the purpose set forth.

Signed at Trumansburg, in the county of Tompkins and State of New York, this 23d day of February, A. D. 1898.

EVERETT F. MORSE.

Witnesses:

FRANK L. MORSE, DAVID B. PERRY. 

